1620580 has 48 divisors (see below), whose sum is σ = 3838464. Its totient is φ = 570240.

The previous prime is 1620571. The next prime is 1620589. The reversal of 1620580 is 850261.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1620571) and next prime (1620589).

It is not an unprimeable number, because it can be changed into a prime (1620589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5845 + ... + 6115.

It is an arithmetic number, because the mean of its divisors is an integer number (79968).

2^1620580 is an apocalyptic number.

1620580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1620580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1919232).

1620580 is an abundant number, since it is smaller than the sum of its proper divisors (2217884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1620580 is a wasteful number, since it uses less digits than its factorization.

1620580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1620580 is about 1273.0200312642. The cubic root of 1620580 is about 117.4600437555.

The spelling of 1620580 in words is "one million, six hundred twenty thousand, five hundred eighty".